diff options
| author | Daisuke Nojiri <dnojiri@chromium.org> | 2015-02-18 16:41:26 -0800 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2015-04-21 08:29:10 +0200 |
| commit | 7ab46f8085146db57699001462da871f2e4d9965 (patch) | |
| tree | 8c56bc6cc1554d311357c919bacf3b20060f1e2a /payloads/libpayload | |
| parent | b048432578871abe69c7eb54404089c42f35c2f6 (diff) | |
| download | coreboot-7ab46f8085146db57699001462da871f2e4d9965.tar.xz | |
libpayload: add timer driver for cygnus
BUG=chrome-os-partner:36011
BRANCH=broadcom-firmware
TEST=measured 10 seconds in depthcharge:
Starting depthcharge on purin...
dpch: time 10
9 8 7 6 5 4 3 2 1 0
Change-Id: I0bcb01c255b19518bb8440111ac81f056c07ed69
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: f5993bd400dd5d38e62d07bc8ce3513175e0d518
Original-Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Original-Reviewed-on: https://chrome-internal-review.googlesource.com/200569
Original-Reviewed-by: Julius Werner <jwerner@chromium.org>
Original-Commit-Queue: Daisuke Nojiri <dnojiri@google.com>
Original-Tested-by: Daisuke Nojiri <dnojiri@google.com>
Original-Change-Id: Id83aae29cec6320d897e0b231d023a9ee885903e
Original-Reviewed-on: https://chromium-review.googlesource.com/256415
Reviewed-on: http://review.coreboot.org/9850
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'payloads/libpayload')
| -rw-r--r-- | payloads/libpayload/Config.in | 5 | ||||
| -rw-r--r-- | payloads/libpayload/drivers/timer/cygnus.c | 31 |
2 files changed, 34 insertions, 2 deletions
diff --git a/payloads/libpayload/Config.in b/payloads/libpayload/Config.in index 455d058dcc..40c57dcb06 100644 --- a/payloads/libpayload/Config.in +++ b/payloads/libpayload/Config.in @@ -442,6 +442,11 @@ config IPQ806X_TIMER_REG help Address of the register to read a free running timer value. +config IPROC_PERIPH_GLB_TIM_REG_BASE + hex "Cygnus timer base address" + depends on TIMER_CYGNUS + default 0x19020200 + config USB bool "USB Support" default n diff --git a/payloads/libpayload/drivers/timer/cygnus.c b/payloads/libpayload/drivers/timer/cygnus.c index 16035496b9..e627d3e532 100644 --- a/payloads/libpayload/drivers/timer/cygnus.c +++ b/payloads/libpayload/drivers/timer/cygnus.c @@ -18,12 +18,39 @@ */ #include <libpayload.h> +struct cygnus_timer { + u32 gtim_glob_low; + u32 gtim_glob_hi; + u32 gtim_glob_ctrl; +}; + +static struct cygnus_timer * const timer_ptr = + (void *)CONFIG_LP_IPROC_PERIPH_GLB_TIM_REG_BASE; + uint64_t timer_hz(void) { - return 0; + /* + * this is set up by coreboot as follows: + * + * PERIPH_CLOCK / + * (((TIMER_GLB_TIM_CTRL_PRESC & TIMER_GLB_TIM_CTRL_PRESC_MASK)>>8) + 1) + * + * where PERIPH_CLOCK is typically 500000000. + */ + return 500000000; } uint64_t timer_raw_value(void) { - return 0; + uint64_t cur_tick; + uint32_t count_h; + uint32_t count_l; + + do { + count_h = readl(&timer_ptr->gtim_glob_hi); + count_l = readl(&timer_ptr->gtim_glob_low); + cur_tick = readl(&timer_ptr->gtim_glob_hi); + } while (cur_tick != count_h); + + return (cur_tick << 32) + count_l; } |